Nurikabe · Expert ✓ Solved
9×9 grid with large islands.
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Keyboard shortcuts
- Arrow keys: move around the grid
- Space or F: shade (sea)
- X: island dot
- Backspace: erase
- Ctrl+Z / Ctrl+Y: undo / redo
- H: hint
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How to play Nurikabe
- Each number belongs to one island: a group of white cells joined side by side, with exactly that many cells (counting the number).
- Every island has exactly one number, and islands never touch side by side.
- All shaded cells (the sea) are connected side by side.
- The sea never has a 2×2 block of shaded cells.
Full guide with an animated example · Strategy guides · Printable Nurikabe
About Expert Nurikabe
9×9 grid with large islands. For experienced solvers who enjoy a long, satisfying challenge.
Other levels: Easy · Medium · Hard
Tips for this level
- Count: the sea is every cell that isn’t part of an island. Add up the numbers to know how many white cells there are.
- Look for 2×2 squares with three shaded cells: the fourth must be land.
- Cells that no island can reach are always sea.